Which system conveys sensory information to the central nervous system in vertebrates?

The peripheral nervous system (PNS) is responsible for conveying sensory information to the central nervous system (CNS) in vertebrates. The PNS consists of all the nerves outside the CNS, including sensory neurons that transmit signals from sensory receptors throughout the body to the brain and spinal cord. This information can include sensations such as touch, temperature, pain, and proprioception.

The PNS serves as a critical link between the external environment and the CNS, enabling the body to respond appropriately to stimuli. The sensory pathways in the PNS are distinct from the CNS itself, which processes and interprets this information. This distinction is essential for understanding how the nervous system functions as a whole.

In contrast, the autonomic nervous system (ANS) primarily regulates involuntary bodily functions such as heart rate and digestion, while the somatic nervous system handles voluntary movements of skeletal muscles. Therefore, while all these systems are interconnected within the broader nervous system, the PNS specifically focuses on the conveyance of sensory input to the CNS.